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cloudreve/service/explorer/file.go

264 lines
7.7 KiB

package explorer
import (
"context"
model "github.com/HFO4/cloudreve/models"
"github.com/HFO4/cloudreve/pkg/cache"
"github.com/HFO4/cloudreve/pkg/filesystem"
"github.com/HFO4/cloudreve/pkg/filesystem/fsctx"
"github.com/HFO4/cloudreve/pkg/filesystem/local"
"github.com/HFO4/cloudreve/pkg/serializer"
"github.com/gin-gonic/gin"
"net/http"
"net/url"
"path"
"strconv"
"time"
)
// SingleFileService 对单文件进行操作的五福path为文件完整路径
type SingleFileService struct {
Path string `uri:"path" binding:"required,min=1,max=65535"`
}
// FileAnonymousGetService 匿名(外链)获取文件服务
type FileAnonymousGetService struct {
ID uint `uri:"id" binding:"required,min=1"`
Name string `uri:"name" binding:"required"`
}
// DownloadService 文件下載服务
type DownloadService struct {
ID string `uri:"id" binding:"required"`
}
// DownloadArchived 下載已打包的多文件
func (service *DownloadService) DownloadArchived(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewFileSystemFromContext(c)
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
// 查找打包的临时文件
zipPath, exist := cache.Get("archive_" + service.ID)
if !exist {
return serializer.Err(404, "归档文件不存在", nil)
}
// 获取文件流
rs, err := fs.GetPhysicalFileContent(ctx, zipPath.(string))
defer rs.Close()
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
if fs.User.Group.OptionsSerialized.OneTimeDownloadEnabled {
// 清理资源,删除临时文件
_ = cache.Deletes([]string{service.ID}, "archive_")
}
c.Header("Content-Disposition", "attachment;")
c.Header("Content-Type", "application/zip")
http.ServeContent(c.Writer, c.Request, "", time.Now(), rs)
return serializer.Response{
Code: 0,
}
}
// Download 签名的匿名文件下载
func (service *FileAnonymousGetService) Download(ctx context.Context, c *gin.Context) serializer.Response {
fs, err := filesystem.NewAnonymousFileSystem()
if err != nil {
return serializer.Err(serializer.CodeGroupNotAllowed, err.Error(), err)
}
// 查找文件
err = fs.SetTargetFileByIDs([]uint{service.ID})
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
// 获取文件流
rs, err := fs.GetDownloadContent(ctx, "")
defer rs.Close()
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
// 发送文件
http.ServeContent(c.Writer, c.Request, service.Name, fs.FileTarget[0].UpdatedAt, rs)
return serializer.Response{
Code: 0,
}
}
// CreateDocPreviewSession 创建DOC文件预览会话返回预览地址
func (service *SingleFileService) CreateDocPreviewSession(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewFileSystemFromContext(c)
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
// 获取文件临时下载地址
downloadURL, err := fs.GetDownloadURL(ctx, service.Path, "doc_preview_timeout")
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
// 生成最终的预览器地址
// TODO 从配置文件中读取
viewerBase, _ := url.Parse("https://view.officeapps.live.com/op/view.aspx")
params := viewerBase.Query()
params.Set("src", downloadURL)
viewerBase.RawQuery = params.Encode()
return serializer.Response{
Code: 0,
Data: viewerBase.String(),
}
}
// CreateDownloadSession 创建下载会话获取下载URL
func (service *SingleFileService) CreateDownloadSession(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewFileSystemFromContext(c)
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
// 获取下载地址
downloadURL, err := fs.GetDownloadURL(ctx, service.Path, "download_timeout")
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
return serializer.Response{
Code: 0,
Data: downloadURL,
}
}
// Download 通过签名URL的文件下载无需登录
func (service *DownloadService) Download(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewFileSystemFromContext(c)
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
// 查找打包的临时文件
file, exist := cache.Get("download_" + service.ID)
if !exist {
return serializer.Err(404, "文件下载会话不存在", nil)
}
fs.FileTarget = []model.File{file.(model.File)}
// 开始处理下载
ctx = context.WithValue(ctx, fsctx.GinCtx, c)
rs, err := fs.GetDownloadContent(ctx, "")
defer rs.Close()
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
// 设置文件名
c.Header("Content-Disposition", "attachment; filename=\""+url.PathEscape(fs.FileTarget[0].Name)+"\"")
if fs.User.Group.OptionsSerialized.OneTimeDownloadEnabled {
// 清理资源,删除临时文件
_ = cache.Deletes([]string{service.ID}, "download_")
}
// 发送文件
http.ServeContent(c.Writer, c.Request, fs.FileTarget[0].Name, fs.FileTarget[0].UpdatedAt, rs)
return serializer.Response{
Code: 0,
}
}
// PreviewContent 预览文件,需要登录会话
func (service *SingleFileService) PreviewContent(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewFileSystemFromContext(c)
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
// 获取文件流
rs, err := fs.GetDownloadContent(ctx, service.Path)
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
defer rs.Close()
http.ServeContent(c.Writer, c.Request, fs.FileTarget[0].Name, fs.FileTarget[0].UpdatedAt, rs)
return serializer.Response{
Code: 0,
}
}
// PutContent 更新文件内容
func (service *SingleFileService) PutContent(ctx context.Context, c *gin.Context) serializer.Response {
// 创建上下文
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// 取得文件大小
fileSize, err := strconv.ParseUint(c.Request.Header.Get("Content-Length"), 10, 64)
if err != nil {
return serializer.ParamErr("无法解析文件尺寸", err)
}
fileData := local.FileStream{
MIMEType: c.Request.Header.Get("Content-Type"),
File: c.Request.Body,
Size: fileSize,
Name: path.Base(service.Path),
VirtualPath: path.Dir(service.Path),
}
// 创建文件系统
fs, err := filesystem.NewFileSystemFromContext(c)
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
// 取得现有文件
exist, originFile := fs.IsFileExist(service.Path)
if !exist {
return serializer.Err(404, "文件不存在", nil)
}
// 给文件系统分配钩子
fs.Use("BeforeUpload", filesystem.HookValidateFile)
fs.Use("BeforeUpload", filesystem.HookResetPolicy)
fs.Use("BeforeUpload", filesystem.HookChangeCapacity)
fs.Use("AfterUploadCanceled", filesystem.HookCleanFileContent)
fs.Use("AfterUploadCanceled", filesystem.HookClearFileSize)
fs.Use("AfterUploadCanceled", filesystem.HookGiveBackCapacity)
fs.Use("AfterUpload", filesystem.GenericAfterUpdate)
fs.Use("AfterValidateFailed", filesystem.HookCleanFileContent)
fs.Use("AfterValidateFailed", filesystem.HookClearFileSize)
fs.Use("AfterValidateFailed", filesystem.HookGiveBackCapacity)
// 执行上传
uploadCtx := context.WithValue(ctx, fsctx.GinCtx, c)
uploadCtx = context.WithValue(uploadCtx, fsctx.FileModelCtx, *originFile)
err = fs.Upload(uploadCtx, fileData)
if err != nil {
return serializer.Err(serializer.CodeUploadFailed, err.Error(), err)
}
return serializer.Response{
Code: 0,
}
}